#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>

int main(){
  while(1){
      printf("进程开始执行，pid：%d\n",getpid());
      sleep(2);
  }
 // printf("进程开始执行：pid：%d\n",getpid());
  return 0;
}
